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Improved search for Ivμ→ve oscillation in a long-baseline accelerator experiment

  • S. Yamamoto
  • , J. Zalipska
  • , E. Aliu
  • , S. Andringa
  • , S. Aoki
  • , J. Argyriades
  • , K. Asakura
  • , R. Ashie
  • , F. Berghaus
  • , H. Berns
  • , H. Bhang
  • , A. Blondel
  • , S. Borghi
  • , J. Bouchez
  • , J. Burguet-Castell
  • , D. Casper
  • , J. Catala
  • , C. Cavata
  • , A. Cervera
  • , S. M. Chen
  • K. O. Cho, J. H. Choi, U. Dore, X. Espinal, M. Fechner, E. Fernandez, Y. Fukuda, J. Gomez-Cadenas, R. Gran, T. Hara, M. Hasegawa, T. Hasegawa, K. Hayashi, Y. Hayato, R. L. Helmer, K. Hiraide, J. Hosaka, A. K. Ichikawa, M. Iinuma, A. Ikeda, T. Inagaki, T. Ishida, K. Ishihara, T. Ishii, M. Ishitsuka, Y. Itow, T. Iwashita, H. I. Jang, E. J. Jeon, I. S. Jeong

Research output: Contribution to journalArticlepeer-review

Abstract

We performed an improved search for a†'Îe oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2ã-1019 protons on target. No evidence for a îe appearance signal was found, and we set bounds on the îa†Îe oscillation parameters. At Î"m2=2.8ã- 10-3eV2, the best-fit value of the K2K îÎdisappearance analysis, we set an upper limit of sina¡22iîe<0.13 at a 90% confidence level.

Original languageEnglish (US)
Article number181801
JournalPhysical review letters
Volume96
Issue number18
DOIs
StatePublished - 2006

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